ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2009, vol. 103, p. -
Measurement of B→K*(892)γ branching fractions and CP and isospin asymmetries
We present an analysis of the decays B0→K*0(892)γ and B+→K*+(892)γ using a sample of about 383×106 BB̄ events collected with the BABAR detector at the PEP-II asymmetric energy B factory. We measure the branching fractions B(B0→K*0γ)=(4. 47±0.10±0.16)×10-5 and B(B+→K*+γ)=(4. 22±0.14±0.16)×10-5. We constrain the direct CP asymmetry to be -0.033<A(B→K*γ)<0.028 and the isospin asymmetry to be 0.017<Δ0-<0.116, where the limits are determined by the 90% confidence interval and include both the statistical and systematic uncertainties. © 2009 The American Physical Society.